PLS HELP DOING A TEST What are the maximum number of electrons for each energy level (from 1 to 7)?

When a comet collides with earth, it adds material to our planet and causes great damage. therefore, a collision like this is a a. destructive force b. constructive force c. geologic process and event d. constructive and destructive force

How many moles of oxygen gas are produced from the decomposition of six moles of potassium chlorate

If a solution contains 3 moles/liter of sodium chloride (nacl, made of sodium ions and chloride ions), what is the osmolarity of this solution